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Pf^yypnNMgNTAL JUNE, 1980 <br />Q <br />15. EROSION CONTROL PLANS AND PROGRAMS WILL BE REQUIRED IN ALL LAND <br />ALTERATION PROJECTS, Each contractor vill be required to tnlninire <br />the probability 'f aoil erosion on site and/or slltation danage <br />downstreac. The snallest anount of bare ground shall be exposed <br />for as short a time as possible. Teaporary ground cover will be <br />required until pernanent cover is provided. Sediment traps will be <br />required on slopes and between construction sites and public roadways. <br />Fill must be compacted and stabilized for permanence. <br />|IRRAN ARfd POttClES FOR NATURAL RFSOURCE MANAGEMENT <br />1. LAND USE STANDARDS WILL LIMIT THE IMPACT OF URBAN ENCROACHMENT ON <br />LAKE MIN’NETONKA. Klnlmua lot widths will space out docks and <br />structural encroachnents while increasing areas of natural vegetation. <br />Lake use regulations will limit the number of boats per property and <br />the amount of public waters available for private docking and boat <br />storage. <br />retention of natural VEGETATION WILL LIMIT THE IMPACT OF URBANIZATION <br />AS VISIBLE FROM THE LAKE. Building heights will be limited to less <br />than the typical tree height'. Klnlnum green bsl*- will be provided <br />with prohibitions against clearcuttlng or excessive thinning of <br />vegetation. Natural vegetation will be preserved on slopes. Retalnlnc <br />walls will be discouraged except when absolutely necessary to prevent <br />erosion I in which case they will be screened with natural vegetation. <br />3. direct runoff INTO THE LAKE WILL BE MINIMIZED. Standards will be <br />established and maintained to limit the amount of Impervious hardcover <br />in proportion to closeness of the shoreline. Maximum hardcover will <br />be limited to 30% of each parcel within 1,000 feet of the shoreline <br />.. pursuant to Kn. ONR recommended shoreline practices. <br />4. ALL EXISTING URBAN WETLANDS WILL BE MAINTAINED AND PROTECTED FOR <br />SURFACE WATER RETENTION AND FILTRATION. The existing urban runoff <br />exceeds the capacity of the urban marshes to assimilate all nutriencs, <br />therefore additional pollution hazards would be created if any wetland <br />would be lost. Additional steps to Improve nutrient assimilation <br />include on-site retention on all new developments and storm water <br />recycling through the existing marshes. <br />5. CITY MAINTENANCE PRACTICES WILL BE DESIGNED TO IMPROVE STORM WATER <br />QUALITY. Salt use for winter street treatment will be minimized. <br />Snow removal practices will locate temporary stofage si'tes where they <br />will not overload the natural drainage system or where foreign matter, <br />especially salt, will not directly enter a marsh or lake. Spring ^ <br />cleanup vill promptly remove road sands and salts before' environments^ <br />damage occurs. <br />- CMB 3--22